Personally, I find the phenomenon both curious and painful. When we moved here in 1993, we worked very hard to become part of Israel. True, we spoke English at home and in no way severed our awareness of an involvement in American culture. Still, we have always had both Israeli and non-Israeli friends. We learned about Israeli culture and politics. My wife studied in Israeli schools and training programs. She volunteered for years in various connections and always worked in Hebrew speaking environments. As a university lecturer, I was immersed in the broader society from Day One (or actually, day 265 because I landed into the biggest academic strike in two decades). More than that, because I was too old to be drafted I spent ten years as a volunteer on the Jerusalem Police Force (מתמי"ד) both to make up for my not serving in the army and to taste something of the melting pot experience that army service provides. The children, despite being raised in an American environment, are integral, caring parts of the fabric of Israeli society. I take tremendous pride in that fact.
Indeed, I cannot imagine doing otherwise. My life is so much richer for being part of this tapestry. I have here a sense of Klal Yisrael, of belonging to the multi-variegated body politic of the Jewish People that cannot be fully expressed in words. The fact that we all speak the same language, understand the same codes, reference the same cultural and religious moments (even among many Secular Jews) is, for me, a profoundly spiritual experience. If you don't crack the language and the semiotic, you deny yourself of that moment of total lack of self-consciousness when something dramatic (good or bad) happens and your Israeli brother or sister says one word (or you do) and you implicitly, intuitively understand and share the experience. The Anglo Olim who, in their fear and/or their arrogance, keep to themselves, deny themselves of all of that.
They also harm the State of Israel. For Anglo-Saxon Jewry is one that grew up under real democratic rule. It is the Jewry that developed Modern Orthodoxy. It is commercially and academically successful and sagacious. In other words, it has its own riches to contribute to the miracle of Israel by adapting its heritage to the unique dynamic of this beautiful Jewish mosaic. It's not fair to keep all of that from the rest. Who knows, perhaps that's why they were privileged to come at this time.
One thing is certain, as with anything of lasting worth in Jewish tradition...If it's not in Hebrew, it will have no future.